iverilog/ivtest/ivltests/signed2.v

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/*
* Copyright (c) 2000 Steve Wilson (stevew@home.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/*
* Verify signed constant assignment to an integer.
*/
module test;
integer I0,I1;
reg [15:0] R0,R1;
reg [3:0] error;
initial
begin
error = 0;
I0 = -4'd12;
I1 = -32'd12;
if(I0 !== 32'hfffffff4)
begin
$display("FAILED - negative decimal assignment failed. I0 s/b fffffff4, is %h",
I0);
error =1;
end
if(I1 !== 32'hfffffff4)
begin
$display("FAILED - negative decimal assignment failed. I1 s/b fffffff4, is %h",
I1);
error = 1;
end
if(error === 0)
$display("PASSED");
end
endmodule